1123400358 has 48 divisors (see below), whose sum is σ = 2612568816. Its totient is φ = 347604480.

The previous prime is 1123400357. The next prime is 1123400371. The reversal of 1123400358 is 8530043211.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1123400353) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2808 + ... + 47483.

It is an arithmetic number, because the mean of its divisors is an integer number (54428517).

Almost surely, 2^1123400358 is an apocalyptic number.

1123400358 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1123400358, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1306284408).

1123400358 is an abundant number, since it is smaller than the sum of its proper divisors (1489168458).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1123400358 is a wasteful number, since it uses less digits than its factorization.

1123400358 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50389 (or 50386 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

The square root of 1123400358 is about 33517.1651247536. The cubic root of 1123400358 is about 1039.5487311156.

Adding to 1123400358 its reverse (8530043211), we get a palindrome (9653443569).

The spelling of 1123400358 in words is "one billion, one hundred twenty-three million, four hundred thousand, three hundred fifty-eight".